So
what do we know? If you ever have to recall, at least clear
all
the melee minions since they give twice as much exp than the ranged
minions. Is your jungler leeching exp from your lane while
he's
just sitting on brush and doing nothing? Let him be,
as both
you and himself will get two-thirds of the exp which is 33% more total
exp. Are you trying to clear a wave of minions with super
minion
in it? Kill the super minion first so that the rest of
minions
are a lot easier to kill (you will find yourself doing up to 70% more
damage to minions when super minion is not present).

Minion
Location Awareness

Your opponent has recalled and you would like to push the lane to deny
them your minion exp under their tower.
But how do you know where the enemy's next minion wave is?
It's simple, check your minimap to see where your minions are.
The enemy minions are exactly at the mirror side of your minions.

A Quick
Estimate of How Many Minions You've Missed

Are you good at
arithmetics and seeking to improve on creep score?
Because
the minions first meet in the middle of the lane at 1:54 and 2:03 for
mid lane and top/bot lane respectively, we can assume that one can
start killing minions at 2:00 mark. 6 minions spawn
every
30s (and 7 minions every third wave) so that's about 13
minions you can kill every minute.

This means (Timer - 1:45) x 13
is how many minions you could have killed if you were to
last hit all the minions at the time.
For example, if you have 31 cs by 5:45 you could have killed
= (5:45 - 1:45)*13
= (4 minutes) * 13
= 52 cs (exact is 50 cs)

So in this example
you have missed rougly 52-31 = 21 cs,

The exact value is shown below

Timer

CS

1:45

0

2:15

6

2:45

12

3:15

19

3:45

25

4:15

31

4:45

38

5:15

44

5:45

50

6:15

57

6:45

63

7:15

69

7:45

76

Detailed Minion Damage CalculationChampions take 40% less
damage from minion attacks and the damage is further
reduced by Champion's armor.

Example

A Caster Minion with 25 Attack Damage attacks a champion with 30 armor.

The damage is further reduced by 30 armor which is 23% damage reduction
(Formula) :

= 15 * (1 - 30 / 130)
= 11.54 actual damage

Note: In League of Legends, all the displayed damage value is
rounded-down.
So in this case 11.54 damage will be shown as dealing 11
damage
in-game. However, the actual damage dealt is still 11.54
because
no value in League of Legends is rounded.